Fluid pump and metering device



Feb. 24, 1942. A. R. PEZZILLO 2,274,274

FLUID PUMP AND METERING DEVICE Filed March 17, 1939 2 Sheets-Sheet 1ALBERT 11.1 EZZ1LL0 1N VENTOR.

W -&

ATTORNEY.

Feb. 24, 1942. PEZZlLLo 2,274,274

FLUID PUMP AND METERING DEVICE Filed March 1'7, 1939 2 Sheets-Sheet 2IHHH I Will ALBERT R. PEZZILLO IN VENTOR.

ATTORNEY.

Patented Feb. 24, 1942 UNITED STATES PATENT OFFICE Application March17,(l::91,8e3 rl;:)No. 262,368

2Claims.

My invention relates to a new and useful fluid pump and metering device,that is, one which can be used for propelling fluids whether they begases or liquids through a pipe or other conduit, or which can, withoutany change in construction, be used for measuring or metering the fluidpassing through said conduit.

My invention still further relates to a device of this character whichcan be partly or wholly submerged in a gas or liquid, and it relatesfurther to a device of this character in which the fluid being impelledor metered is adapted to pass through the device as distinguished fromordinary pumps the impellers of which simply serve to propel a liquidfrom one side thereof to the other with or without building up pressure.

My invention further relates to a device of this character comprising arotor and a stator in which the impelllng element forms part of therotor while the stator element, which is hermetically sealed andelectrically and magnetically insulated from the rotor, is eitherinserted within a pipe or the like or forms part of the pipe or otherconduit to which it is applied.

For the purpose of illustrating my invention, I have shown in theaccompanying drawings,

- forms thereof which at the present are preferred by me, since theywill give in practice satisfactory and reliable results, although it isto be understood that the various instrumentalities of which myinvention consists can be variously arranged and organized and that myinvention is not limited to the precise arrangement or organization ofthese instrumentalities as herein shown and desired.

In the accompanying drawings:

Fig. 1 represents a vertical section of a fluid pump and metering deviceembodying my invention the same being an enlarged view on line l-l ofFig. 2, certain parts being shown in elevation.

Fig. 2 represents a right hand end elevation of Fig. l with thecompanion flange removed.

Fig. 3 represents a right hand elevation of Fig. l with the companionflange and the motor cover removed.

Fig. 4 represents a vertical sectional view of a modified form of myinvention, the same being an enlarged sectional view on line 44 of Fig.5.

Fig. 5 represents a top plan view of Fig. 4, this view being taken alongline 5-5 of Fig. 4.

Fig. 6 represents a bottom plan view of Figs. 4 or 5.

Fig. '7 represents a sid e elevation of a hollow shaft propeller whichmay be used in either form of construction.

Fig. 8 represents an end elevation of Fig. 7.

Referring to the drawings in which like reference characters indicatelike parts, and more particularly to Fig. 1 my novel pump and meteringdevice comprises an impeller I formed of the blades 2 and 4 which aremounted upon or are formed integral with the hub or sleeve 6 on theshaft 8 running through or made integral with the hub member 6. l0designates the motor rotor which is fastened to or cast integral withthe blades 2 and 4 along their edges l2. In this manner the propellerand the rotor are dynamically balanced on the shaft 0, which isjournalled in bearings l4 which are held in perfect concentric alignmentby the spiders l6 forming part of the motor covers II. A slight gap 20is maintained between the rotor l0 and the nonmagnetic and electrically,non-conducting stationary cylinder 22. The cylinder 22 is invested atboth ends in rubber gasketed seats 24 which are formed on the inside ofthe motor covers l8. Mounted about the cylinder 22 is the motor statorwhich comprises the usual segments 26, the motor windings 28 andclamping band or housing 30. The covers l8 are bolted together againstthe cylinder 22 and the surrounding stator by the bolts 32 and nuts 33.The covers l8 carry studs and nuts 34 which hold the flanges 36 in aliquid-tight manner against the covers I! along the joints 38. Theflanges 36 carry the pipe line sections 39. As will be seen from Fig. 1,except for the space taken up by the blades 2 and 4 of the impeller, theinternal area of the rotor is the same as the internal area orcapacitylof the pipe lines 39; In order to cool the motor windings 28 Ihave provided the air vents 4|! best seen in Fig. 2, and the motorstator is provided with the usual thermal overload cut-out 4| which issuitably secured to the motor housing 30. While I have shown the leadingedges 42 and 44 of the blades 2 and 4 at an angle of from each other(see Fig. 3), I may use any type or shape of impeller now or in thefuture available, which, by rotation will propel fluids through therotor from one of the pipes 39 into the other.

From the foregoing it will be seen that my novel pump and meteringdevice becomes part of the pipe line in connection with which it is tobe used, the overall diameter of my device being in some instances onlyslightly larger than the overall diameter of the line itself. The valueof this feature can best be realized when it is remembered that if aconventional pump were used it would have to be placed at right anglesto the line and the impeller haft would have to run through a stuilingbox in a T-shaped housing applied to the line. This conventionalstructure is clumsy and difficult to keep packed and running eillcientlyeand quietly. With my novel arrangement the pump conforms to the contourof the pipe line and the ineflicient conventional impeller and stuihngbox are eliminated.

can be ejected into the pipe line II in Fig. 4 while the air is admittedthrough the screen ll. In this construction I can use any desired formof impel1er,eitherasshowninFigs.1and4oras showninFigs'i and8.Ifitisdesiredtomixa plurality of fluids, whether they be gases orliquids or a mixture of both, the desired number of conduits can bepositioned at the inlet end of the impeller of the rotor and the mixturewill be delivered at the outlet end thereof The operation is as follows:

To use my novel device of the semi-submerged type shown in Figs. 1, 2and 3, the current is turned on the motor in the conventional manner andthe torque impetus given to the rotor by the stator assembly, turns therotor clockwise as shown in Fig. 3 by the arrow. Th blades 2 and 4 ofthe rotor I are so designed that the cutting u. The bushing l4 near thetop end of the shaft ported in a hub or bearing 5| formed in the cover52. The cover 52 is supported b the legs 54 which are provided with boltholes 56 for the purpose of securing the housing in position. The cover52 is also provided with studs it which are engaged by the nuts 62 toclamp the cover 52 in fluidstight position against the gasket N. Thestud 60 and nut 62 also serve to clamp the cover 52 against theinsulating cylinder 22 and the housing 50 which encloses the stator ofthe construction illustrated in Fig. 4. By means ,of the dowelarrangement 66 the housing It is held in proper concentric position withrespect to the cover 52 and hence the shaft 8 is properly aligned andthis results in adequate alignment and concentricity of the rotor IIwith respect to the insulating cylinder 22 and also insures the uniformgap 20 between the rotor Ill and .the cylinder 22. A portion of thecover 52 registering with the internal diameter of the rotor is eitherformed as, or provided with, a screen effect I to prevent suction intothe rotor of objects too big to be safely propelled therethrough. Inconnection with the submerged type of pump, such as is illustrated inFig. 4, I provide the lead wires 12 which are enclosed in a fluid-tightpipe 14 extending to the source of power. Also, the pipe 14 may encloseother wires (not shown) extending to the cut-out II in the event thatsuch wires cannot be conveniently disposed in the fluid-tight spac 16.

While I have thus far described my invention as relating to a pump, Iwish to point out that my invention can be used equally well, andwithout any change, as a metering device since I can, by disconnectingthe wires 12 from the source of power and by connecting the windings toan ammeter, transform the motor into a generatcr, and, by forcing fluidthrough the rotor to turn the impeller i or 46, I can generate currentwhich, when measured on the ammeter and suitably calibrated, willindicate the volume of rat offiow through the rotor.

Similarly, if it is desired to use my ccnstruc ion for mixing variousfluids such, for instance, as air and fuel oil, I can use the hollowshaft 11 (shown in Fig. '7) in place of the shaft I (shown in Figs. 1and 4), and through the hollow shaft 6 I can pass a tube It throughwhich a fuel meter.

edges 42 and I4 engage the liquid coming from the left or upstream sideof the pump and propels it through the rotor and forces the liquid outof the right hand end of the pump as shown by the two arrows in Fig. 1.

To use my fully submerged type shown in Figs. 4, 5 and 6, the current isturned on the motor in the conventional manner, the rotor ll in thisstructure is so designed that it must turn counterclockwise and thelower cutting edge I! of the helical or spiral propeller blade 48 willpick up the liquid, gas or air coming through the'screen apertures Itand move same through the length of the propeller 40 into the outletpipe II.

It will be seen that my novel electric pump has few parts, all of themare of simple construction and of great durability, with none of thecomplications which arise over a period of long use." The rotor iseasily balanced dynamically and it can be maintained in its concentricposition without costly manufacturing processes, which insures that thegap II will be maintained accurately throughout.

With the above described reversal of action, the pump now becomes agenerator which with a suitable ammeter is metamorphosed into a flowThis reversed action will make it possible to produce a very cheap andreliable metering device which would replace many of the costly andunsatisfactory orifice metering valves now on the market. There is nolubrication necessary, no annoying stuffing boxes to be repacked atinconvenient intervals and no mechanical moving parts that have to beserviced, which would entail the breaking of pipe joints andinterrupting the service for which the installation was made.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patentis:

i. In a device of the character stated, a sectional housing having endsections one of which forms an inlet and the other an outlet and havingan outer casing clamped between said end members, the latter havingannular grooves on their inner faces. preformed sealing means in saidgrooves, a non-magnetic open ended cylinder contributing with saidhousing to form stator and rotor chambers, means to secure said endmembers to said casing and thereby press the open ends of said cylinderagainst said sealing means, a stator in the stator casing. and a rotorwithin the stator and having a bladed shaft journalled in said endmembers.

2. In a device of the character stated, a sectional housinghaving endsections one of which forms an inlet and the other an outlet and havingan outer casing clamped between said end members, the latter havingannular grooves on their inner races, sealing means in said grooves, anon-magnetic cylinder contributing with said housing to form stator androtor chambers, means to secure said end members to said casing andthereby press the ends of said cylinder against said sealing means, astator in the stator casing, and a rotor having an impeller within thestator and having a shaft journalled in said and members, said shaftbeing tubular for passage of a fluid diflerent from that or the fluidcirculated by the blades.

ALBERT R. PEZZILLO.

